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Where do I clear US customs?

Ottawa, Canada
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Where do I clear US customs?


Flying from Ottawa to Las Vegas, with a connection in Calgary. Do we clear US Customs in Ottawa or Calgary.


Greater Sydney...
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17,584 posts
91 reviews
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1. Re: Where do I clear US customs?

I would reckon Calgary as that is the flight departure to the US. Ottawa to Calgary would be domestic. To be sure though, check with the airlines.

Liverpool, UK
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20,545 posts
36 reviews
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2. Re: Where do I clear US customs?

Calgary as this is your international departure point - you also pre clear US Immigration at this point and arrive at LAS as a domestic flight.

Dallas, Texas
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3,441 posts
17 reviews
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3. Re: Where do I clear US customs?

Calgary for sure.

San Francisco...
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for San Francisco
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52,850 posts
149 reviews
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4. Re: Where do I clear US customs?

Well as you know you do not need to go through any formalities for going from Ottawa to Calgary as both cities are in Canada Your flight from Calgary to Vegas is international and that is why you will go through pre clearance in Calgary as the PP mentioned

5. Re: Where do I clear US customs?

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